28124161 has 16 divisors (see below), whose sum is σ = 32919040. Its totient is φ = 23794560.

The previous prime is 28124093. The next prime is 28124167. The reversal of 28124161 is 16142182.

It is a cyclic number.

It is not a de Polignac number, because 28124161 - 2¹⁷ = 27993089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28124167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5821 + ... + 9493.

It is an arithmetic number, because the mean of its divisors is an integer number (2057440).

Almost surely, 2^28124161 is an apocalyptic number.

It is an amenable number.

28124161 is a deficient number, since it is larger than the sum of its proper divisors (4794879).

28124161 is a wasteful number, since it uses less digits than its factorization.

28124161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736.

The product of its digits is 768, while the sum is 25.

The square root of 28124161 is about 5303.2217566306. The cubic root of 28124161 is about 304.1070757679.

It can be divided in two parts, 281 and 24161, that added together give a palindrome (24442).

The spelling of 28124161 in words is "twenty-eight million, one hundred twenty-four thousand, one hundred sixty-one".